US3641318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Record medium and a method for storage of information
Assignee: Individual
•
Filing: 1969-04-23
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Granted: 1972-02-08
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Expires: 1989-04-23
Abstract
Abstract A storage medium consisting of a dielectric with preformed holes. Electrode pairs are inserted into selected ones of the holes and an electric discharge renders the walls of these holes conductive, either by deposition of carbon from the dielectric or by metal deposition from the electrodes. Sensing of information is by similar electrodes having a voltage not large enough to cause discharge.
Inventors
- 👤 Gunnar Tolle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:24
CPC Classifications
G; G06; G06K; G06K1/00; G06K1/12; G06K1/128; G06K19/00; G06K19/06; G06K19/067
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
159 words
A method of storing and reading information on a plate of dielectric material which comprises the steps of providing an arrangement of holes in predetermined location on the dielectric material; positioning a pair of electrodes on opposite sides of a hole at which it is desired to store information; establishing a first potential across the pair of electrodes, the potential being sufficient to produce a discharge across the electrodes whereby the walls of the hole are rendered conductive; removing the first potential and the pair of electrodes; subsequently positioning a pair of electrodes on opposite sides of a hole at which it is desired to read information; establishing a second potential across the reading electrodes, the second potential being sufficient to cause conduction between the reading electrodes across the hole walls which has been rendered conductive but insufficient to cause discharge between the electrodes if the hole walls are not conductive and detecting current flow between the reading electrodes.
Claim 2
Independent Claim
159 words
A method of storing and reading information on a plate of dielectric material which comprises the steps of providing an arrangement of holes in predetermined location on the dielectric material; positioning a pair of electrodes on opposite sides of a hole at which it is desired to store information; establishing a first potential across the pair of electrodes, the potential being sufficient to produce a discharge across the electrodes whereby the walls of the hole are rendered conductive; removing the first potential and the pair of electrodes; subsequently positioning a pair of electrodes on opposite sides of a hole at which it is desired to read information; establishing a second potential across the reading electrodes, the second potential being sufficient to cause conduction between the reading electrodes across the hole walls which has been rendered conductive but insufficient to cause discharge between the electrodes if the hole walls are not conductive and detecting current flow between the reading electrodes.
Claim 3
Dependent Claim
21 words
The method according to claim 1, wherein the electric discharge carbonizes the walls of the hole to provide a conductive layer.
Claim 4
Dependent Claim
32 words
The method according to claim 1, wherein a portion of the material of the electrodes is deposited on the walls of the holes during the electric discharge to provide a conductive layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |